Center Drive Sludge Scraper 0.2 – 2.0 M/Min Rotating Sludge Scraper

Center-Drive Sludge Scraper

Product Overview

The Central Drive Sludge Scraper is designed for circular sedimentation and thickening tanks to collect and discharge settled sludge from the tank bottom.
Driven by a central gearbox, the scraper arms rotate slowly, pushing sludge toward the central hopper for discharge, while optional skimmers remove surface scum.
It features simple structure, reliable operation, and easy maintenance, making it ideal for municipal and industrial wastewater treatment plants.

Working Principle
Wastewater enters through the central feed pipe and distributes evenly within the circular tank.
Under gravity, solids settle at the bottom. The central drive mechanism rotates scraper arms slowly, directing sludge toward the center hopper for discharge by gravity or suction.
Surface scum is collected by the scum skimmer and discharged via the scum trough.
The system supports automatic operation and overload protection.

Main Components

• Central Drive Unit: Gear reducer and shaft assembly driving scraper rotation.

• Scraper Arm & Blades: Radially arranged arms directing sludge to center.

• Central Bearing Support: Ensures smooth rotation and torque stability.

• Sludge Hopper & Discharge Pipe: Collects and removes sludge.

• Scum Skimmer (Optional): Removes floating scum from surface.

• Bridge or Platform: Supports drive unit and provides access.

• Control System: PLC control with overload protection.

Features

• Simple structure and reliable operation;

• Torque overload protection for safety;

• Suitable for large and medium circular tanks;

• Lightweight, corrosion-resistant scraper arms;

• Optional scum removal for combined operation;

• Fully automatic and remote monitoring available.

Applications

• Secondary and primary clarifiers in municipal WWTPs;

• Industrial wastewater settling or thickening tanks;

• Water treatment plant sedimentation systems;

• Sludge concentration and reuse processes.

Optional Configurations

• Scum removal system – with skimmer arm and trough;

• Torque protection – mechanical/electrical overload safeguard;

• VFD control – automatic speed adjustment;

• Bridge options – travelling, fixed, or step type;

• Discharge types – gravity or suction;

• Corrosion protection – epoxy coating, galvanizing, or stainless steel;

• Smart monitoring – remote data and performance tracking.